Ensure consistent JAVAattr tasty output

## Compiler version

3.4.0-RC1-bin-SNAPSHOT

## Minimized code

Before we freeze 28.4.0 TASTy, we should ensure that JAVAattr output is consistent.

Currently `<FromJavaObject>` does appear in TASTy generated for Java sources. We should ensure that it is consistently applied (i.e. there is not a mix of `java.lang.Object` and `<FromJavaObject>`)
